The Technical Parameters of Valves for Supercritical Thermal Power Units

The Technical Parameters of Chinese Valves for Supercritical Thermal Power Units​

Classification

Names of Valves

Materials
(NPS)
Normal Pipe Size(NPS)
Pressure Rating
 

Installation Position

Type One

1. Gate valves
WB36, F91, etc. ≤24" ≤4500
For water supply pipelines and stream pipelines

2. Global valves
WB36, F91, etc. ≤6" ≤4500
For water supply pipelines,  stream pipelines

3. Check valves
WB36, F91, etc. ≤24" ≤2500
For water supply pipelines and stream pipelines

4. Relief valves
WB36, A105, etc. ≤6" ≤3000
For water supply pipelines

Type Two

1. Safety valves
F91 and F92 ≤6" ≤1500
For reheater inlets /outlets

2. Main steam gate valves
F92 ≤22" ≤4500
For main steam pipelines

3. Traps
F91 and F92 ≤3" ≤4500
For drain pipelines

4. Extraction check valves
WC9 and C12A ≤48" ≤2500
For pumping pipelines

5. High-pressure heater three-way valves(hydraulic, electric )
WB36 ≤20" ≤2500
For high-pressure heater feed water pipelines

6. Pneumatic butterfly valves
A105 and Q345B ≤2800mm PN6bar
For  small-sized turbine exhaust pipelines

7. Partial control valves
WC9, F22, F91, etc. ≤16" ≤2500
For reheater desuperheating water, high-pressure HP heater drain steam,  
soot blowing reducing station and water storage tank pipelines

Type Three

1. Main stream safety valves

Superheater outlet safety valves
F92 2.5" 4500
Higher than the position of the  outlet 

Superheater inlet safety valves
WC9 3" 4500  

2. Electromagnetic relief valves
F92 2.5" 4500 Higher than the position of the outlet

 
3. Control valves

Control valves for boiler BCP circulation pipeline
WC9 16" 2500
For boiler circulation pipelines

Feed water bypass control valves
 
WC9 14" 2500
Boiler feed water bypass pipelines

Feed pump recycling  control valves with minimum flow
WB36 8" 2500
For feed pump recirculation pipelines

Pressure regulating  valves
F92 3" 4500
 
For high-pressure steam supply stations of steam engines

Reheater spray water control valves(with adjustable nozzles)
SA106C 3" 1500
Reheater spray water pipelines

4. High pressure by-pass valves

High pressure bypass valves
F92 14/30" 4500
For high pressure bypass steam pipelines
High pressure spray water control valves WB36 6" 2500
High pressure by-pass desuperheating water pipelines
 
High pressure spray water isolation valves
WB36 6" 2500
For high pressure bypass desuperheating water pipelines
 

They belong to the same type of valve

5. Low pressure by-pass valves

Low pressure bypass valves
F92 22/36" 1500
For low pressure bypass steam pipelines
LBPE WCB 8" 300
For low pressure bypass desuperheating water pipelines

(They belong to the same type of valve)

Low pressure spray water isolating valves
WCB 8" 300
For low pressure  bypass desuperheating water pipelines

(They belong to the same type of valve)
Oct 26,2017
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